{-# LANGUAGE DeriveGeneric #-}
{-# LANGUAGE DuplicateRecordFields #-}
{-# LANGUAGE NamedFieldPuns #-}
{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE RecordWildCards #-}
{-# LANGUAGE StrictData #-}
{-# LANGUAGE TypeFamilies #-}
{-# LANGUAGE NoImplicitPrelude #-}
{-# OPTIONS_GHC -fno-warn-unused-binds #-}
{-# OPTIONS_GHC -fno-warn-unused-imports #-}
{-# OPTIONS_GHC -fno-warn-unused-matches #-}

-- Derived from AWS service descriptions, licensed under Apache 2.0.

-- |
-- Module      : Amazonka.Evidently.ListSegments
-- Copyright   : (c) 2013-2023 Brendan Hay
-- License     : Mozilla Public License, v. 2.0.
-- Maintainer  : Brendan Hay
-- Stability   : auto-generated
-- Portability : non-portable (GHC extensions)
--
-- Returns a list of audience segments that you have created in your
-- account in this Region.
--
-- This operation returns paginated results.
module Amazonka.Evidently.ListSegments
  ( -- * Creating a Request
    ListSegments (..),
    newListSegments,

    -- * Request Lenses
    listSegments_maxResults,
    listSegments_nextToken,

    -- * Destructuring the Response
    ListSegmentsResponse (..),
    newListSegmentsResponse,

    -- * Response Lenses
    listSegmentsResponse_nextToken,
    listSegmentsResponse_segments,
    listSegmentsResponse_httpStatus,
  )
where

import qualified Amazonka.Core as Core
import qualified Amazonka.Core.Lens.Internal as Lens
import qualified Amazonka.Data as Data
import Amazonka.Evidently.Types
import qualified Amazonka.Prelude as Prelude
import qualified Amazonka.Request as Request
import qualified Amazonka.Response as Response

-- | /See:/ 'newListSegments' smart constructor.
data ListSegments = ListSegments'
  { -- | The maximum number of results to include in the response. If you omit
    -- this, the default of 50 is used.
    maxResults :: Prelude.Maybe Prelude.Natural,
    -- | The token to use when requesting the next set of results. You received
    -- this token from a previous @ListSegments@ operation.
    nextToken :: Prelude.Maybe Prelude.Text
  }
  deriving (Prelude.Eq, Prelude.Read, Prelude.Show, Prelude.Generic)

-- |
-- Create a value of 'ListSegments' with all optional fields omitted.
--
-- Use <https://hackage.haskell.org/package/generic-lens generic-lens> or <https://hackage.haskell.org/package/optics optics> to modify other optional fields.
--
-- The following record fields are available, with the corresponding lenses provided
-- for backwards compatibility:
--
-- 'maxResults', 'listSegments_maxResults' - The maximum number of results to include in the response. If you omit
-- this, the default of 50 is used.
--
-- 'nextToken', 'listSegments_nextToken' - The token to use when requesting the next set of results. You received
-- this token from a previous @ListSegments@ operation.
newListSegments ::
  ListSegments
newListSegments =
  ListSegments'
    { maxResults = Prelude.Nothing,
      nextToken = Prelude.Nothing
    }

-- | The maximum number of results to include in the response. If you omit
-- this, the default of 50 is used.
listSegments_maxResults :: Lens.Lens' ListSegments (Prelude.Maybe Prelude.Natural)
listSegments_maxResults = Lens.lens (\ListSegments' {maxResults} -> maxResults) (\s@ListSegments' {} a -> s {maxResults = a} :: ListSegments)

-- | The token to use when requesting the next set of results. You received
-- this token from a previous @ListSegments@ operation.
listSegments_nextToken :: Lens.Lens' ListSegments (Prelude.Maybe Prelude.Text)
listSegments_nextToken = Lens.lens (\ListSegments' {nextToken} -> nextToken) (\s@ListSegments' {} a -> s {nextToken = a} :: ListSegments)

instance Core.AWSPager ListSegments where
  page rq rs
    | Core.stop
        ( rs
            Lens.^? listSegmentsResponse_nextToken
            Prelude.. Lens._Just
        ) =
        Prelude.Nothing
    | Core.stop
        ( rs
            Lens.^? listSegmentsResponse_segments
            Prelude.. Lens._Just
        ) =
        Prelude.Nothing
    | Prelude.otherwise =
        Prelude.Just
          Prelude.$ rq
          Prelude.& listSegments_nextToken
          Lens..~ rs
          Lens.^? listSegmentsResponse_nextToken
          Prelude.. Lens._Just

instance Core.AWSRequest ListSegments where
  type AWSResponse ListSegments = ListSegmentsResponse
  request overrides =
    Request.get (overrides defaultService)
  response =
    Response.receiveJSON
      ( \s h x ->
          ListSegmentsResponse'
            Prelude.<$> (x Data..?> "nextToken")
            Prelude.<*> (x Data..?> "segments" Core..!@ Prelude.mempty)
            Prelude.<*> (Prelude.pure (Prelude.fromEnum s))
      )

instance Prelude.Hashable ListSegments where
  hashWithSalt _salt ListSegments' {..} =
    _salt
      `Prelude.hashWithSalt` maxResults
      `Prelude.hashWithSalt` nextToken

instance Prelude.NFData ListSegments where
  rnf ListSegments' {..} =
    Prelude.rnf maxResults
      `Prelude.seq` Prelude.rnf nextToken

instance Data.ToHeaders ListSegments where
  toHeaders =
    Prelude.const
      ( Prelude.mconcat
          [ "Content-Type"
              Data.=# ( "application/x-amz-json-1.1" ::
                          Prelude.ByteString
                      )
          ]
      )

instance Data.ToPath ListSegments where
  toPath = Prelude.const "/segments"

instance Data.ToQuery ListSegments where
  toQuery ListSegments' {..} =
    Prelude.mconcat
      [ "maxResults" Data.=: maxResults,
        "nextToken" Data.=: nextToken
      ]

-- | /See:/ 'newListSegmentsResponse' smart constructor.
data ListSegmentsResponse = ListSegmentsResponse'
  { -- | The token to use in a subsequent @ListSegments@ operation to return the
    -- next set of results.
    nextToken :: Prelude.Maybe Prelude.Text,
    -- | An array of structures that contain information about the segments in
    -- this Region.
    segments :: Prelude.Maybe [Segment],
    -- | The response's http status code.
    httpStatus :: Prelude.Int
  }
  deriving (Prelude.Eq, Prelude.Read, Prelude.Show, Prelude.Generic)

-- |
-- Create a value of 'ListSegmentsResponse' with all optional fields omitted.
--
-- Use <https://hackage.haskell.org/package/generic-lens generic-lens> or <https://hackage.haskell.org/package/optics optics> to modify other optional fields.
--
-- The following record fields are available, with the corresponding lenses provided
-- for backwards compatibility:
--
-- 'nextToken', 'listSegmentsResponse_nextToken' - The token to use in a subsequent @ListSegments@ operation to return the
-- next set of results.
--
-- 'segments', 'listSegmentsResponse_segments' - An array of structures that contain information about the segments in
-- this Region.
--
-- 'httpStatus', 'listSegmentsResponse_httpStatus' - The response's http status code.
newListSegmentsResponse ::
  -- | 'httpStatus'
  Prelude.Int ->
  ListSegmentsResponse
newListSegmentsResponse pHttpStatus_ =
  ListSegmentsResponse'
    { nextToken = Prelude.Nothing,
      segments = Prelude.Nothing,
      httpStatus = pHttpStatus_
    }

-- | The token to use in a subsequent @ListSegments@ operation to return the
-- next set of results.
listSegmentsResponse_nextToken :: Lens.Lens' ListSegmentsResponse (Prelude.Maybe Prelude.Text)
listSegmentsResponse_nextToken = Lens.lens (\ListSegmentsResponse' {nextToken} -> nextToken) (\s@ListSegmentsResponse' {} a -> s {nextToken = a} :: ListSegmentsResponse)

-- | An array of structures that contain information about the segments in
-- this Region.
listSegmentsResponse_segments :: Lens.Lens' ListSegmentsResponse (Prelude.Maybe [Segment])
listSegmentsResponse_segments = Lens.lens (\ListSegmentsResponse' {segments} -> segments) (\s@ListSegmentsResponse' {} a -> s {segments = a} :: ListSegmentsResponse) Prelude.. Lens.mapping Lens.coerced

-- | The response's http status code.
listSegmentsResponse_httpStatus :: Lens.Lens' ListSegmentsResponse Prelude.Int
listSegmentsResponse_httpStatus = Lens.lens (\ListSegmentsResponse' {httpStatus} -> httpStatus) (\s@ListSegmentsResponse' {} a -> s {httpStatus = a} :: ListSegmentsResponse)

instance Prelude.NFData ListSegmentsResponse where
  rnf ListSegmentsResponse' {..} =
    Prelude.rnf nextToken
      `Prelude.seq` Prelude.rnf segments
      `Prelude.seq` Prelude.rnf httpStatus